package com.shuaitao.newsystem.bean;

import lombok.Data;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.nio.channels.NonWritableChannelException;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @Author 三更  B站： https://space.bilibili.com/663528522
 */
@Data
public class LoginUser implements UserDetails {


    private static LoginUser loginUser = new LoginUser();
    private LoginUser() {}
    public static LoginUser getInstance(){
        return loginUser;
    }
    private NewsUsers user;
    //存储权限信息
    private List<String> permissions;

    @Override
    public String toString() {
        return "LoginUser{" +
                "user=" + user +
                ", permissions=" + permissions +
                ", authorities=" + authorities +
                '}';
    }

    public LoginUser(NewsUsers user, List<String> permissions) {
        this.user = user;
        this.permissions = permissions;
    }


    //存储SpringSecurity所需要的权限信息的集合
    private List<GrantedAuthority> authorities;

    @Override
    public  Collection<? extends GrantedAuthority> getAuthorities() {
        if(authorities!=null){
            return authorities;
        }
        //把permissions中字符串类型的权限信息转换成GrantedAuthority对象存入authorities中
        authorities = permissions.stream().
                map(SimpleGrantedAuthority::new)
                .collect(Collectors.toList());
        return authorities;
    }

    @Override
    public String getPassword() {
        return user.getUpwd();
    }

    @Override
    public String getUsername() {
        return user.getUname();
    }


    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}
